<script>
function ouvrefenetre (adresse){
var hauteur=screen.height/2;
var largeur=2*screen.width/3;
var pos_y=(screen.height-hauteur)/2;
var pos_x=(screen.width-largeur)/2;
var caracteristiques = "top="+ (pos_y) +",left="+ (pos_x) +",height="+ (hauteur) +",width="+ (largeur) + ",status=no,scrollbars=yes,menubar=no,resizable=yes";
var gar_fen = window.open(adresse,"calendrier",caracteristiques);
diminution_opacite();
}
</script>